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Q 2214178959.     In a sports competition, involving some boys and girls, every student had to play exactly one game with other student. It was found that in 300 games both the players were boys and in 870 games, both the players were girls. The number of games in which one player was a boy and other was a girl is?
IBPS-PO 2017 Mock Mains
(Provided By a Student and Checked/Corrected by EXXAMM.com Team)